Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 911 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) a complete loop (d) one loose end
2. 2.Which of these gives us electricity? (a) a washing machine (b) a generator (c) a television (d) an air conditioner
3. 3.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pour water on them (c) shout for an adult (d) pull them by the hand
4. 4.Which of these is an insulator? (a) aluminium foil (b) a glass marble (c) a graphite rod (d) a metal paper clip
5. 5.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
6. 6.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) by Wi-Fi (d) not joined
7. 7.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
8. 8.True or false: to climb an electric pole is safe. (a) False (b) True
9. 9.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a tilt switch
11. 11.True or false: to touch a fallen wire is safe. (a) False (b) True
12. 12.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
13. 13.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
14. 14.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
15. 15.Which of these is safe? (a) use mains for a project (b) touch a switch when wet (c) use small battery cells (d) climb an electric pole
16. 16.Which of these uses electricity? (a) a bicycle dynamo (b) a solar panel (c) a cell (d) a water pump
17. 17.Which of these is true of a series circuit? (a) a single current path (b) many paths for current (c) own switch for each bulb (d) one out, the rest glow
18. 18.Which drawing is the symbol for a resistor? (a) a straight line (b) a small empty box (c) triangle against a bar (d) two equal parallel lines
19. 19.🔌 Most metals are good … (a) magnets only (b) conductors (c) batteries (d) insulators
20. 20.True or false: a ceramic cup is a conductor. (a) False (b) True
21. 21.True or false: triangle, bar and arrows is the symbol for an LED. (a) False (b) True
22. 22.True or false: a toaster mainly makes movement. (a) True (b) False
23. 23.True or false: one tall, one short bar is the symbol for a motor. (a) False (b) True
24. 24.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) a break stops every bulb (d) many paths for current
25. 25.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a tilt switch (c) a push button (d) a toggle switch
26. 26.What does a push button do? (a) springs back when let go (b) stays where you flip it (c) closes when tipped over (d) closes near a magnet
27. 27.🔍 Which is the odd one out? (a) build with an adult near (b) poke things in a socket (c) use small battery cells (d) keep drinks far away
28. 28.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
29. 29.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
30. 30.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) a cell is taken out
31. 31.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 2 and 5 are taken out of their holders. How many bulbs glow?
32. 32.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
33. 33.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
34. 34.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) cell (c) wire (d) battery
35. 35.What does a reed switch do? (a) closes near a magnet (b) closes when tipped over (c) springs back when let go (d) stays where you flip it
36. 36.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
37. 37.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
38. 38.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True

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